Nonsense. The power of an alternative employment offer is the leverage its gives you against your current salary. As a green card holder, my employer has twice

Nonsense. The power of an alternative employment offer is the leverage its gives you against your current salary. As a green card holder, my employer has twice matched competing offers resulting in significant raises. If I was still on an H-1B, I would never have been able to negotiate that way because of the risk that they fire me and I get deported.